Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'abf1c7abcfac2c2609761ee4a6e61102b3c8c0ee2c6a5add31c59675b2559893' 
  AND token = 'RjMFDIwKbUNVm8fhT9N0v56ZSt5SftMwBxzQf7PdRcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}